Precambrian lithospheric evolution of the Fennoscandian Shield
Generalized reconstructions have been made on the basis of integrated DSS and CDP data and seismological evidence of local and remote earthquakes obtained for the Fennoscandian Shield over the last forty years. They have provided quantitative information on the horizontal and vertical heterogeneiti...
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Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine
2017-10-01
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| Series: | Геофизический журнал |
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| Online Access: | https://journals.uran.ua/geofizicheskiy/article/view/112341 |
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| author | N. Sharov L. P. Sviridenko |
| author_facet | N. Sharov L. P. Sviridenko |
| author_sort | N. Sharov |
| collection | DOAJ |
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Generalized reconstructions have been made on the basis of integrated DSS and CDP data and seismological evidence of local and remote earthquakes obtained for the Fennoscandian Shield over the last forty years. They have provided quantitative information on the horizontal and vertical heterogeneities of the lithosphere. Three-dimensional seismogeological models for some parts of the Fennoscandian Shield have been constructed for the first time. They show that the crystalline crust attains a blocky-hierarchical structure and that no persistent seismic boundaries have been found within the entire shield. In the upper part of the crust, both waveguides and high-velocity zones, which correlate with geological bodies, occur locally. The structural plans of velocity isolines in various deep sections have been found to be inconsistent. It has been proved that major geological provinces differ in crustal thickness, while Early Proterozoic volcanogenic belts display elevated velocities and crustal thickness. Anomalously high velocity layers in the upper mantle of the Fennoscandian Shield have been identified. The structure of the upper portion of the lithosphere was found to be geologically and geophysically related to the geological units of the Palaeoproterozoic East Scandinavian basic large igneous province.
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| format | Article |
| id | doaj-art-ffdba206a8fc46b7adf044bdfbfd7ef1 |
| institution | Matheson Library |
| issn | 0203-3100 2524-1052 |
| language | English |
| publishDate | 2017-10-01 |
| publisher | Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine |
| record_format | Article |
| series | Геофизический журнал |
| spelling | doaj-art-ffdba206a8fc46b7adf044bdfbfd7ef12025-06-27T10:12:43ZengSubbotin Institute of Geophysics of the National Academy of Sciences of UkraineГеофизический журнал0203-31002524-10522017-10-0139510.24028/gzh.0203-3100.v39i5.2017.112341Precambrian lithospheric evolution of the Fennoscandian ShieldN. Sharov0L. P. Sviridenko1Institute of Geology of the Karelian Scientific Center of the Russian Academy of Sciences, PetrozavodskInstitute of Geology of the Karelian Scientific Center of the Russian Academy of Sciences, Petrozavodsk Generalized reconstructions have been made on the basis of integrated DSS and CDP data and seismological evidence of local and remote earthquakes obtained for the Fennoscandian Shield over the last forty years. They have provided quantitative information on the horizontal and vertical heterogeneities of the lithosphere. Three-dimensional seismogeological models for some parts of the Fennoscandian Shield have been constructed for the first time. They show that the crystalline crust attains a blocky-hierarchical structure and that no persistent seismic boundaries have been found within the entire shield. In the upper part of the crust, both waveguides and high-velocity zones, which correlate with geological bodies, occur locally. The structural plans of velocity isolines in various deep sections have been found to be inconsistent. It has been proved that major geological provinces differ in crustal thickness, while Early Proterozoic volcanogenic belts display elevated velocities and crustal thickness. Anomalously high velocity layers in the upper mantle of the Fennoscandian Shield have been identified. The structure of the upper portion of the lithosphere was found to be geologically and geophysically related to the geological units of the Palaeoproterozoic East Scandinavian basic large igneous province. https://journals.uran.ua/geofizicheskiy/article/view/112341lithosphereseismic boundarymantle diapirismgranitizationfluid |
| spellingShingle | N. Sharov L. P. Sviridenko Precambrian lithospheric evolution of the Fennoscandian Shield Геофизический журнал lithosphere seismic boundary mantle diapirism granitization fluid |
| title | Precambrian lithospheric evolution of the Fennoscandian Shield |
| title_full | Precambrian lithospheric evolution of the Fennoscandian Shield |
| title_fullStr | Precambrian lithospheric evolution of the Fennoscandian Shield |
| title_full_unstemmed | Precambrian lithospheric evolution of the Fennoscandian Shield |
| title_short | Precambrian lithospheric evolution of the Fennoscandian Shield |
| title_sort | precambrian lithospheric evolution of the fennoscandian shield |
| topic | lithosphere seismic boundary mantle diapirism granitization fluid |
| url | https://journals.uran.ua/geofizicheskiy/article/view/112341 |
| work_keys_str_mv | AT nsharov precambrianlithosphericevolutionofthefennoscandianshield AT lpsviridenko precambrianlithosphericevolutionofthefennoscandianshield |